Swivel-capstan.



C. SHERWOOD.

SWIVEL CAPSTAN.

APPLICATION FILED AUG. ze, 1911.

Patented t12111.30, 1912.-

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SLW/theme10 GRAPH C0.,wAsHlNGTON n c UNITED STATES PATENT OFFICE.

CHARLES SHERWOOD, 0F FRIENDSHIP, NEW YORK.

SWIVEL-CAPSTAN.

To all 'whom t may concern Be it known that I, CHARLES SHnRwooD, acitizen of the United States of America,

residing at Friendship, in the county ofA Allegany and State of NewYork, have invented certain new and useful Improvements inSwivel-Capstans, of which the following is a specification.

This invention relates to swivel capstans designed for the purpose oflifting or loading heavy articles or for logging purposes and one of theprincipal objects of the invention is to provide a winding mechanismpivoted or swiveled to a base so thatthe winding reel will always be atright angles to the pull of the lifting cable.

Another ob] ect of the invention is to provi'de a swivel capstan ofsimple construction which will be efficient in operation and which willalways assume the proper position to give a direct pull on the liftingcable or rope in whatever position the load may occupy relatively to thewinding reel.

Still another object of the invention is to provide a winding mechanismin which a spur gear of peculiar form is substituted for the ordinarybevel gear in order that the swivel action of the reel may not beinterfered with in its various movements.

These and other objects may be attained by means of the constructionillustrated in the accompanying drawings, in which Figure 1 is a sideelevation of a capstan or winding mechanism made in accordance with myinvention; Eig. 2 is a plan view of the same showing the winding drum inone of its positions; Fig. 3 is a plan view showing the winding drum inanother position; and Fig. 4 is a vertical sectional view of the same.

Referring to the drawings7 the numeral 1 designates the base or supportfor the capstan, said base or support being substantially semicircularin plan and provided with a dove-tailed groove 2 extending around nearits outer edge. The base 1 is preferably of skeleton form and providedwith a central brace 3 and a right angular member 4. Pivotally mountedupon a vertical shaft 5 is a supporting plate 6 provided with adovetailed tenon on its lower side which fits into the dove-tailedgroove 2 and permits the plate 6 to swing on the shaft 5. Secured to thesupporting plate 6 and extending vertically therefrom is a bracket 7having bear- 'ing plates 8 at its upper end to support the Specicationof Letters Patent.

Application led August 28, 1911.

Serial No. 646,453.

reel shaft 9, the opposite end of said shaft being supported upon abracket 1() also secured to the plate 6 and said bracket being providedwith bearing plates 11 at its upper end. The reel shaft 9 is providedwith a cable guard 12 near one end and suitably spaced therefrom is acombined cable guard and miter gear 13. The gear teeth 14 extendradially and are separated one from the other, as shown. These gearteeth engage and are in constant mesh with the spur gear teeth 15 on agear wheel 16 fixed to the shaft 5. The shaft 5 is journaled at itsupper end in a bracket 17 connected to the bearing plates 11 by means ofsuitable bolts-18. For

rotating the spur gear 16, I have provided a vertically disposed spurgear wheel 19, having teeth 2O which are oppositely beveled. The gearwheel 19 is secured to a shaft 21 journaled in the upper end of abracket 22 secured to the base 1. On the outer end of the shaft 21 is apower pulley 23 and a rope or cable 24 extends around the pulley 23 andto a power motor or engine for operating the capstan. The pulley rope orcable 25 passes around the shaft 9 and is connected to the load orarticle to be lifted.

The operation of my invention may be briefly described as follows:l/Vhen it is desired to lift a load at any desired angle from thewinding mechanism, the cable 25 is connected to the load and the reelingmechanism is held at right angles to the cable 25 by means of a pin awhich may be inserted in any of the holes b in the base 1 to hold thereel at right angles to the line of pull of the cable 25. Power beingapplied to the rope or cable 24, the spurY gear wheel 19 will engage theteeth 15 of the spur gear 16 and rotate the same. The teeth 15 of thespur gear 16 will engage the teeth 14 to rotate the reel. There arespecial advantages in using the spur gear wheels shown since theyoperate smoothly and are as strong and durable if not more so than theordinary miter gear teeth.

From the foregoing, it will be obvious that a swivel capstan made inaccordance with my invention can be used for many purposes and will befound powerful and quick in operation, not liable to get out of orderand can pull the load from any angle relatively tothe winding mechanism.

I claim In a swivel capstan, a substantially semicircular skeleton basehaving a dove-tailed Patented Jan. 30,1912.

groove in its upper surface extending around near the outer edge of saidbase, said base being provided with a central integral brace and anintegral right angular member connecting the ends of the semi-circularbase, a substantially rectangular supporting plate pivotally mountedabove the base on a vertically extending shaft at the center ofcurvature of said base, said supporting plate carrying a downwardlyextending dove-tailed tenon adapted to travel in said groove, avertically extending bracket secured to the outer end of said supportingplate, a vertically extending bracket secured to said plate near thepivot point thereof, said brackets having bearing plates at their upperends, a reel shaft rotatably mounted in said bearings, said reel shaftbeing provided wit-h a cable guard near its outer end, a combined cableguard and initer gear ixedly mounted on said reel shaft near the innerend thereof, a horizontally disposed spur gear wheel mounted on saidvertically extending shaft, said spur gear wheel meshing with the saidmiter gear to operate the reel shaft, a vertically extending bracketsecured to the central part of the said right angular member, saidbracket being provided with bearings upon its upper end, a horizontallydisposed shaft rotatably mounted in said bearings, a vertically disposedspur gear wheel ixedly mounted on the inner end of said horizontallydisposed shaft, said spur gear wheel meshing with the said horizontallydisposed spur gear wheel for operating the same, a power pulley fixedlysecured to the outer end of said horizontally disposed shaft foroperating said shaft, and a horizontally disposed bracket iixed to thesaid vertically extending bracket secured to the supporting plate nearthe pivot point thereof, the upper end of said vert-ical shaft beingournaled in the said horizontally disposed bracket, and means forholding the said base plate in ad justed position.

In testimony whereof I affix my signature in presence of two Witnesses.

CHARLES SHERVOOD.

lVitnesses W. L. THURs'roN, E. M. CAPRON.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

